Framing-square.



"-No. 721,274, PATBNTBD FEB. 24, 190s.

'H. A. BANKSTQN. FRAMING SQUARE. g

APPLICATION FILED MAR. e. 1902.

No MODEL.

attoznup UNITED STATES PATENT OFFICE.

HIRAM AROHIE BANKSTON, OF MACON, GEORGIA.

FRAMING-SQUARE.

SPECIFICATION forming part of Letters Patent No. 721,274, dated February 24, 1903.

Application filed March 6,1902.

To all whom it may concern/.1 Y y Y Be it known thatI, HIRAM ARCHIE BANKS- TON, a citizen of the United States, residing at Macon, in the county of Bibb and State of Georgia, have invented certain new and useful Improvements in Framing-Squares; p and I do declare the following to be a full, clear, and exact description of the invention, such as Will enable others skilled in the art to which it appertains to make and use the same.

The invention relates to framing-squares.

The object of the invention is to provide a device of this character which shall be simple of construction, durable in use, comparatively inexpensive of production and efcient in operation, and by means of which various angles may be laid off and measured with precision. .l Y

With this and other objects in view the invention consists of certain novel features ofconstruction, combination, and arrangement of parts, which Will be hereinafter more fully described, and particularly pointed out in the appended claim.

In the accompanying drawings, Figure lis a plan view of my improved framing-square. Fig. 2 is a sectional view on line o: fr, Fig. v1. Fig. 3 is a similar view on line y y, Fig. 1. Fig. 4: is a view of one type of the clamps used, and Fig. 5 is a View ofl the other .type of clamps used. Fig. 6 is adetail view showing the angle-scale.

In the drawings, l denotes a square of the usual construction, graduated in inches and subdivisions thereof in the usual manner.

' 2 and 3 denote adjustable blades suitably graduated. The blade 2 is adjustably con nected to the member a of the square by a `clamp 2', and is also ad j ustably connectedto the blade b of the square by a clamp 2n. The clamp 2' consists ofra U-shaped frame,which embraces the upper end of the blade 2 and the member a of the square, and is provided with a set-screw 2b, having. a plate 2c swiv eled to its inner end, said plate having 1mar1, ginal flanges 2d, which engage the edges of the blade 2. The clamp 2a consists of a U- shaped frame having a set-screw 2", formed with a head 2", and is adapted to clamp the lower end of the blade 2 to the member b of Serial No. 96,998. (No model.)

sary, and the blade 3 is connected to the blade 2 by a clamp 3a, similar in construction to the clamp 2?.

4 4' represent scales on the blades, which correspond with those on the arms of the square,Whereby the blades may be'accurately and quickly set to extendat any desired angle to the square. f V

To ascertain the length of a timber-say a rafter-the pitch and dimensions of the roof being known, the blade 2 is appropriately adjusted on and fastened to the arms of the square, when the required length of the timber may be read on" the scale on the said blade which corresponds with the scales now used on the arms of the square. This also enables the bevel cuts for the ends of the rafter to be ascertained with ease andaccuracy.

The two adjustable blades 2 3 are used in connection with each other and the square to determine the length of and4 bevel cuts for ends of timbers to be vangularly disposed or cross-braced and the bevel cuts'or rabbets at the points where the timbers are to cross one another. This is done by appropriately adjusting the blades2 3 with reference to each other and the arms of the square and noting the readings on the scales. I u

The implement may be used yfor a variety of purposesfor plotting and for marking Work, .in framing houses, and in stair and bridge building, the blades 2 3 being adjustable to any desired angle with reference to each other and to the arms of the square.

From the foregoing description, taken in connection with the accompanying drawings, the construction, mode of operatiomand advantages of the invention willbe readily understood without requiring an` extendedexplanation. u

Various changes in thev form, proportion, and details of construction may be made within the scope of the invention Without departing from the spirit or sacriicing any of the advantages thereof.

IOO

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

In combination with a try-square, blades 2, 3, having scales corresponding to those of the square, the clamps 2', 2, 3' and 3, each comprising a U-shaped frame carrying a swiveled clamping member, and a set-screw to adj ustably secure the blades to each other ro and to the square, the bearing members of the clamps 2', 3', consisting of plates having flanges engaging the edges of the blades, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing wit- 15 IleSSeS.

HIRAM ARCHIE BANKSTON. Witnesses:

DAVID L. BROWN, J. P. STEWART. 

